stdlib.strings

Added string functions to standard library

pkg/stdlib/strings/case.go

@@ -0,0 +1,42 @@
+package strings
+
+import (
+	"context"
+	"github.com/MontFerret/ferret/pkg/runtime/core"
+	"github.com/MontFerret/ferret/pkg/runtime/values"
+	"strings"
+)
+
+/*
+ * Converts strings to their lower-case counterparts. All other characters are returned unchanged.
+ * @param src (String) - The source string.
+ * @returns (String) - THis string in lower case.
+ */
+func Lower(_ context.Context, args ...core.Value) (core.Value, error) {
+	err := core.ValidateArgs(args, 1, 1)
+
+	if err != nil {
+		return values.EmptyString, err
+	}
+
+	text := strings.ToLower(args[0].String())
+
+	return values.NewString(text), nil
+}
+
+/*
+ * Converts strings to their upper-case counterparts. All other characters are returned unchanged.
+ * @param src (String) - The source string.
+ * @returns (String) - THis string in upper case.
+ */
+func Upper(_ context.Context, args ...core.Value) (core.Value, error) {
+	err := core.ValidateArgs(args, 1, 1)
+
+	if err != nil {
+		return values.EmptyString, err
+	}
+
+	text := strings.ToUpper(args[0].String())
+
+	return values.NewString(text), nil
+}